The board that provides services to 21,000 developmentally disabled people in Franklin County is seeking a levy in November that would raise the same amount of money as the current levy and cost homeowners the same.

Franklin County commissioners will hear a presentation Thursday on the Franklin County Board of Developmental Disabilities levy request.

The board is the beneficiary of two taxes levied on Franklin County property owners:

• In 2009, a permanent levy approved by voters was estimated to raise $94.2 million and cost the owner of a $100,000 home about $107 per year. The permanent levy was sought because the cost of caring for the population often is for life.

• In 2013, voters approved a six-year levy also estimated to raise $94.2 million and cost the owner of a $100,000 home about $107 per year. It expires at the end of 2018. This is the levy the board wants to extend for 10 more years, with collections beginning in 2019.

That means the levies combined are expected to raise $188.4 million for the Developmental Disabilities board per year, costing the owner of a $100,000 home $213.78.

"This has been a well-run levy agency with a long-time director who has been effective with levy dollars," County Administrator Kenneth Wilson said Wednesday.

The levies pay for services that can include schooling, housing, employment, food, transportation and other services for the developmentally disabled and their families.

Fifty years ago in 1967, Franklin County residents first passed a property tax to support the developmentally disabled and their families. Last year, the board and those funds provided services to more than 20,000 seniors, adults, children and infants with developmental disabilities — double the number served 15 years ago.

And that population is expected to increase, along with the need for services.

Enrollment in the program has averaged between 3 percent and 5 percent annual growth since 2000 and is expected to grow at the same rate throughout the proposed 10-year levy. That's because medical technology is helping the disabled live longer and Franklin County's population is expected to increase by 1 million by 2050.